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公开(公告)号：US11933772B2
公开(公告)日：2024-03-19
申请号：US17422274
申请日：2019-01-17
Applicant: SHIMADZU CORPORATION
Inventor： Takuya Yonekura , Masato Watanabe
IPC: G01N30/74
CPC classification number: G01N30/74
Abstract: An absorbance detector for a chromatograph includes a light source, a flow cell that receives light generated by the light source, a photodetector that detects light transmitted through the flow cell, a light shield member that shields at least part of the light generated from the light source to the flow cell, a motor that rotates the light shield member to change the light shield member between a light-shielding state where the light shield member shields at least part of the light generated from the light source to the flow cell and a non-light-shielding state where the light shield member does not shield the light generated from the light source to the flow cell, and a reference position detector that rotates the motor and also acquires a change in amount of light received by the photodetector to detect a reference position of the light shield member in a rotation direction of the light shield member based on the acquired change in the amount of the received light.
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公开(公告)号：US10578544B2
公开(公告)日：2020-03-03
申请号：US16318789
申请日：2016-08-25
Applicant: Shimadzu Corporation
Inventor： Yusuke Nagai , Masato Watanabe
Abstract: A flow cell includes a housing, a window member, and a pressing member. The housing includes a cell channel in which a sample flows through, has, on at least one end side of the cell channel, an opening communicating with the cell channel, and has a flat surface at an edge of the opening. The window member has a lens portion at a central portion and a peripheral edge portion whose one surface and the other surface are flat. In the window member, one surface of the peripheral edge portion is provided facing the flat surface of the housing so as to seal the opening.
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公开(公告)号：US09835598B2
公开(公告)日：2017-12-05
申请号：US14012227
申请日：2013-08-28
Applicant: SHIMADZU CORPORATION
Inventor： Masato Watanabe , Masahide Gunji
CPC classification number: G01N30/30 , Y10T137/6416 , G01N2030/626
Abstract: A heat insulating member 13 is provided on the outer circumference of a connection pipe 11. The heat insulating member 13 includes: a tube 12; and an air layer 15 between the connection pipe 11 and the tube 12. Accordingly, it is possible to always keep the temperature of a sample component at the time of detection by a detector constant and thus prevent an influence of the temperature on an output result of the detector, in a low flow rate analysis using a modularized column unit and a modularized detection unit.
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公开(公告)号：US20170248562A1
公开(公告)日：2017-08-31
申请号：US15421548
申请日：2017-02-01
Applicant: SHIMADZU CORPORATION
Inventor： Yusuke Nagai , Masato Watanabe
CPC classification number: G01N30/88 , G01N30/74 , G01N30/8665 , G01N35/00623 , G01N2030/027 , G01N2030/8804 , G01N2030/889
Abstract: Provided is an analytical measurement device system 10 having a plurality of units (liquid-sending pump 12; detector 15) including: a sensor (flow sensor 121; light amount detector 151) provided in at least one unit among the plurality of units, for detecting the condition of a specific portion of the unit; a determination section (flow rate determiner 122; light amount determiner 152) provided in the unit, for receiving a signal from the sensor and for determining an overall condition of the unit based on a predetermined determination criterion; a storage section (flow-rate determination information storage section 123; light-amount determination information section 153) provided in the unit, for storing the determination criterion and a result of the determination by the determination section; and a display section (flow-rate determination result display section 124; light-amount determination result display section 154) provided in the unit, for displaying the determination result.
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公开(公告)号：US09877368B2
公开(公告)日：2018-01-23
申请号：US15015810
申请日：2016-02-04
Applicant: SHIMADZU CORPORATION
Inventor： Yusuke Nagai , Keisuke Ogawa , Masato Watanabe , Kumiko Jingu , Masanori Fujiwara , Tomoyuki Yamazaki
CPC classification number: H05B33/0851 , G01N21/33 , G01N2201/0621 , G01N2201/0638 , G01N2201/0692 , G01N2201/0695
Abstract: Provided is an optical analyzer for performing a feedback control on the amount of light emitted from an LED as a light source, in which the configuration of an optical system is made simple and the degree of freedom in optical system arrangement is secured. An optical member 2 for focusing most of light while discharging part of the light as unfocused light is provided on an optical path from a light casting unit 1 to a sample cell 3. The optical member 2 can be achieved with a simple configuration, for example, two ball lenses spaced apart by a predetermined distance from each other. The light focused by the optical member 2 is cast as measurement light into the sample cell 3. Meanwhile, a second photodetector 5 is arranged at a position where the unfocused light reaches. The second photodetector 5 generates a detection signal in accordance with the amount of light that has entered the second photodetector 5 as monitored light, and a drive current to be supplied to an LED is controlled through a drive current controlling unit 6 and a current source 7 such that the amount of light is maintained at a fixed level.
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Patent Agency Ranking
公开(公告)号：US12078624B2
公开(公告)日：2024-09-03
申请号：US17433671
申请日：2019-03-12
Applicant: SHIMADZU CORPORATION
Inventor： Takuya Yonekura , Masato Watanabe
CPC classification number: G01N30/74 , G01N2030/027
Abstract: A spectrophotometer (40) includes a sample placement unit (422) in which a sample to be analyzed is placed, a light source unit (411, 412) including a plurality of light sources that irradiates the sample placed in the sample placement unit (422) with light, a detection unit (425) that detects light emitted from the sample (422), a housing (41, 42) that accommodates the sample placement unit (422), the light source unit (411, 412), and the detection unit (425), a storage unit (71) in which information of a temperature value predetermined for each combination of one or a plurality of light sources among the plurality of light sources is stored, a light source designation accepting unit (721) that accepts designation related to a combination of one or a plurality of light sources among the plurality of light sources, a target temperature setting unit (722) that reads a temperature value corresponding to the combination of light sources accepted by the light source designation accepting unit from the storage unit and sets the temperature to the target temperature, and a temperature adjusting unit (416, 417, 426, 427, 723) that maintains a temperature inside the housing at a target temperature.
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公开(公告)号：US11480553B2
公开(公告)日：2022-10-25
申请号：US16469744
申请日：2017-11-13
Applicant: Shimadzu Corporation
Inventor： Masato Watanabe
Abstract: A detector includes a light source configured to emit measurement light, a flow cell incorporating a cell channel through which a sample solution flows inside, a photodetector configured to detect light from the flow cell, an optical system configured to guide light from the light source to the flow cell and guide light from the flow cell to the photodetector, and a flow cell accommodating part configured to cover the flow cell so as to spatially separate the flow cell from the optical system. Of the side surfaces of the flow cell accommodating part, the side surfaces facing the light incident surface and the light exit surface of the flow cell are formed from wall surfaces made of a light transmissive material, or sealed by a light transmissive plate material.
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公开(公告)号：US11175218B2
公开(公告)日：2021-11-16
申请号：US16604999
申请日：2017-12-25
Applicant: SHIMADZU CORPORATION
Inventor： Masato Watanabe
Abstract: A flow cell includes a cell into which a liquid to be measured is introduced and is arranged so that a measurement light to be used for measuring an optical characteristic of the liquid enters one side of the cell and exits from the other side of the cell, an inlet for leading the liquid to flow into the cell, and an outlet for leading the liquid in the cell to flow out from the cell. The inlet and the outlet are provided to form an interface between a liquid flowing into the cell through the inlet and a liquid with which the cell has been already filled at two places on an optical path of the measurement light passing through the cell.
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公开(公告)号：US11002604B2
公开(公告)日：2021-05-11
申请号：US16266132
申请日：2019-02-04
Applicant: Shimadzu Corporation
Inventor： Masato Watanabe
Abstract: The purpose is to reduce the influence on the measurement due to high order diffracted light without arranging a filter for removing high order diffracted light between a diffraction grating and a PDA. The correction method includes a correction coefficient determination step of determining a correction coefficient related to a ratio of a portion of a detection signal value to the detection signal value, the portion of the detection signal value being derived from a second order diffracted light of light in the first wavelength range contained in the detection signal value of a long wavelength side photodiode for detecting light in the second wavelength range in the photodiode array, and a correction unit configured to obtain a corrected detection signal value derived from light in the second wavelength range from a different detection signal value of the long wavelength side photodiode by using the correction coefficient determined by the correction coefficient determination step.
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公开(公告)号：US10935425B2
公开(公告)日：2021-03-02
申请号：US16626404
申请日：2017-07-18
Applicant: SHIMADZU CORPORATION
Inventor： Masato Watanabe , Takuya Yonekura , Hiroyuki Togo , Shinji Tsuji , Yugo Ishihara , Atsushi Sakamoto
Abstract: A spectroscopic detector includes a lamp house, a sample cell, an optical sensor, a heater, a cooling fan, a temperature sensor, and a control device. The heater heats the lamp house while being directly or indirectly in contact with the lamp house containing a light source. The cooling fan is for cooling the lamp house. The temperature sensor is for detecting a temperature of the lamp house. The control device is configured to control operations of the light source, the heater, and the cooling fan. The control device includes a temperature control part configured to maintain a temperature of the lamp house while the light source is lit at a set temperature by controlling at least output of the heater based on a detection signal of the temperature sensor.
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